Why are two children born to the same parents (not identical twins) unlikely to have the same genetic makeup?
Multiple Choice
Crossing-over recombines portions of sister chromatids.
Fertilization provides a new pairing of chromosomes.
Each sperm or egg has a random assortment of chromosomes, half from each pair.
Chromosomes align themselves independently during meiosis I.
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All of the answer choices lead to genetic differences among siblings.
